Digital version of the Cape Cod and the Islands Geologic Map (CAPE_GEOLGEOG shapefile, Geographic, NAD83)

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Frequently anticipated questions:

What does this data set describe?

Title:
Digital version of the Cape Cod and the Islands Geologic Map (CAPE_GEOLGEOG shapefile, Geographic, NAD83)
Abstract:
These data represent a digital form of the geologic map of Cape Cod and the islands.
  1. How might this data set be cited?
    Cross, VeeAnn A., 2004, Digital version of the Cape Cod and the Islands Geologic Map (CAPE_GEOLGEOG shapefile, Geographic, NAD83): Open-File Report 03-221, U.S. Geological Survey, Coastal and Marine Geology Program, Woods Hole Coastal and Marine Science Center, Woods Hole, MA.

    Online Links:

    This is part of the following larger work.

    Hallett, B.W., Paskevich, V.F., Poppe, L.J., Brand, S.G., and Blackwood, D.S., 2004, A Pictorial Survey of the Bedrock Beneath Western Cape Cod, Massachusetts: Open-File Report 03-001, U.S. Geological Survey, Reston, VA.

    Online Links:

  2. What geographic area does the data set cover?
    West_Bounding_Coordinate: -70.949375
    East_Bounding_Coordinate: -69.926684
    North_Bounding_Coordinate: 42.083040
    South_Bounding_Coordinate: 41.238200
  3. What does it look like?
    http://pubs.usgs.gov/of/2003/of03-221/data/basemaps/cape_cod_geology/capecodgeology-thumb.gif (GIF)
    Thumbnail image showing overview of the geologic map of Cape Cod.
    http://pubs.usgs.gov/of/2003/of03-221/data/basemaps/cape_cod_geology/capecodgeology.gif (GIF)
    Browse map showing the overview of the geologic map of Cape Cod.
  4. Does the data set describe conditions during a particular time period?
    Calendar_Date: 1986
    Currentness_Reference:
    publication date
  5. What is the general form of this data set?
    Geospatial_Data_Presentation_Form: vector digital data
  6. How does the data set represent geographic features?
    1. How are geographic features stored in the data set?
      This is a Vector data set. It contains the following vector data types (SDTS terminology):
      • G-polygon (848)
    2. What coordinate system is used to represent geographic features?
      Horizontal positions are specified in geographic coordinates, that is, latitude and longitude. Latitudes are given to the nearest 0.000001. Longitudes are given to the nearest 0.000001. Latitude and longitude values are specified in Decimal degrees. The horizontal datum used is North American Datum of 1983.
      The ellipsoid used is Geodetic Reference System 80.
      The semi-major axis of the ellipsoid used is 6378137.000000.
      The flattening of the ellipsoid used is 1/298.257222.
  7. How does the data set describe geographic features?
    cape_geolgeog
    Shapefile Attribute Table (Source: ESRI)
    FID
    Internal feature number. (Source: ESRI) Sequential unique whole numbers that are automatically generated.
    Shape
    Feature geometry. (Source: ESRI) Coordinates defining the features.
    ID
    software generated value (Source: ESRI) Information unavailable from original metadata.
    GEOLUNIT
    Geologic unit abbreviation. (Source: Original map publishers - Oldale and Barlow) character data set
    GEOLDESC
    Brief description of the geologic unit. (Source: Condensed from the original unit descriptions appearing on the paper map by Oldale and Barlow.) character data set

Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
    • VeeAnn A. Cross
  2. Who also contributed to the data set?
  3. To whom should users address questions about the data?
    VeeAnn A. Cross
    U.S. Geological Survey
    Marine Geologist
    384 Woods Hole Rd.
    Woods Hole, MA

    (508) 548-8700 x2251 (voice)
    (508) 457-2310 (FAX)
    vatnipp@usgs.gov

Why was the data set created?

This shapefile is provided as a digital representation of the original paper geologic map: Geologic map of Cape Cod and the Islands, Massachusetts. See source contribution for detailed citation.

How was the data set created?

  1. From what previous works were the data drawn?
    Geology map (source 1 of 1)
    Oldale, Robert N., and Barlow, Roger A., 1986, Geologic map of Cape Cod and the Islands, Massachusetts: Miscellaneous Investigations Series Map I-1763, U.S. Geological Survey, Reston, VA.

    Type_of_Source_Media: paper map
    Source_Contribution: Geologic interpretation to digitize.
  2. How were the data generated, processed, and modified?
    Date: unknown (process 1 of 15)
    The original paper map was scanned and converted to a TIFF image using a large format scanner in Reston, VA. Person who carried out this activity:
    Dave Foster
    U.S. Geological Survey
    Geologist
    384 Woods Hole Rd.
    Woods Hole, MA
    USA

    (508) 548-8700 x2271 (voice)
    (508) 457-2310 (FAX)
    dfoster@usgs.gov
    Date: unknown (process 2 of 15)
    This original TIFF image was then registered using BlueMarble geographic transformer software. This original georeferencing was based on the UTM, zone 19, NAD27 tic marks available on the map. Person who carried out this activity:
    Dave Foster
    U.S. Geological Survey
    Geologist
    384 Woods Hole Rd.
    Woods Hole, MA
    USA

    (508) 548-8700 x2271 (voice)
    (508) 457-2310 (FAX)
    dfoster@usgs.gov
    Date: unknown (process 3 of 15)
    This UTM, Zone 19, NAD27 image was then reprojected using BlueMarble geographic transformer to UTM, Zone 19, NAD83. Person who carried out this activity:
    Dave Foster
    U.S. Geological Survey
    Geologist
    384 Woods Hole Rd.
    Woods Hole, MA
    USA

    (508) 548-8700 x2271 (voice)
    (508) 457-2310 (FAX)
    dfoster@usgs.gov
    Date: unknown (process 4 of 15)
    Using this UTM, NAD83 image as a backdrop, the geologic contacts were heads up digitized in ESRI's ArcMap, 8.2 software. Person who carried out this activity:
    VeeAnn A. Cross
    U.S. Geological Survey
    Marine Geologist
    384 Woods Hole Rd.
    Woods Hole, MA
    USA

    (508) 548-8700 x2251 (voice)
    (508) 457-2310 (FAX)
    vatnipp@usgs.gov
    Date: unknown (process 5 of 15)
    Attributes reflecting the information recorded on the original geologic map were added to the shapefile. Person who carried out this activity:
    VeeAnn A. Cross
    U.S. Geological Survey
    Marine Geologist
    384 Woods Hole Rd.
    Woods Hole, MA
    USA

    (508) 548-8700 x2251 (voice)
    (508) 457-2310 (FAX)
    vatnipp@usgs.gov
    Date: unknown (process 6 of 15)
    Within ArcView 3.2, the avenue script calcapl.ave was run on the shapefile to help identify sliver polygons. Person who carried out this activity:
    VeeAnn A. Cross
    U.S. Geological Survey
    Marine Geologist
    384 Woods Hole Road
    Woods Hole, MA
    USA

    (508) 548-8700 x2251 (voice)
    (508) 457-2310 (FAX)
    vatnipp@usgs.gov
    Date: unknown (process 7 of 15)
    Due to the large number of sliver polygons, the decision was made to convert the shapefile to a coverage using the ArcInfo command shapearc. A subclass was specified so that the attribute information already in the shapefile would be carried over to the coverage. Person who carried out this activity:
    VeeAnn A. Cross
    U.S. Geological Survey
    Marine Geologist
    384 Woods Hole Road
    Woods Hole, MA
    USA

    (508) 548-8700 x2251 (voice)
    (508) 457-2310 (FAX)
    vatnipp@usgs.gov
    Date: unknown (process 8 of 15)
    Once the shapefile was in a coverage, CLEAN was run on the coverage with a fuzzy tolerance of 1 and a dangle tolerance of 0. Person who carried out this activity:
    VeeAnn A. Cross
    U.S. Geological Survey
    Marine Geologist
    384 Woods Hole Road
    Woods Hole, MA
    USA

    (508) 548-8700 x2251 (voice)
    (508) 457-2310 (FAX)
    vatnipp@usgs.gov
    Date: unknown (process 9 of 15)
    This polygon coverage was then converted back to a shapefile with unnecessary attribute columns deleted. Person who carried out this activity:
    VeeAnn A. Cross
    U.S. Geological Survey
    Marine Geologist
    384 Woods Hole Road
    Woods Hole, MA
    USA

    (508) 548-8700 x2251 (voice)
    (508) 457-2310 (FAX)
    vatnipp@usgs.gov
    Date: unknown (process 10 of 15)
    Polygons with small areas were looked at more closely to see if any larger sliver polygons escaped the clean process. Those that did escape were merged with the adjacent larger polygons of the same geologic unit. Person who carried out this activity:
    VeeAnn A. Cross
    U.S. Geological Survey
    Marine Geologist
    384 Woods Hole Road
    Woods Hole, MA
    USA

    (508) 548-8700 x2251 (voice)
    (508) 457-2310 (FAX)
    vatnipp@usgs.gov
    Date: unknown (process 11 of 15)
    Once the shapefile was cleaned and edits were complete, the UTM projected shapefile was projected to geographic coordinates. Person who carried out this activity:
    VeeAnn A. Cross
    U.S. Geological Survey
    Marine Geologist
    384 Woods Hole Road
    Woods Hole, MA
    USA

    (508) 548-8700 x2251 (voice)
    (508) 457-2310 (FAX)
    vatnipp@usgs.gov
    Data sources produced in this process:
    • cape_geolgeog.dbf
    • cape_geolgeog.shp
    • cape_geolgeog.shx
    Date: 09-Nov-2015 (process 12 of 15)
    Edits to the metadata were made to fix any errors that MP v 2.9.30 flagged. This is necessary to enable the metadata to be successfully harvested for various data catalogs. In some cases, this meant adding text "Information unavailable" or "Information unavailable from original metadata" for those required fields that were left blank. None of the original process steps had process dates, so the value of unknown was used. Other minor edits were probably performed (title, publisher, publication place, etc.). The metadata date (but not the metadata creator) was edited to reflect the date of these changes. The metadata available from a harvester may supersede metadata bundled within a download file. Compare the metadata dates to determine which metadata file is most recent. Person who carried out this activity:
    U.S. Geological Survey
    Attn: VeeAnn A. Cross
    Marine Geologist
    384 Woods Hole Rd.
    Woods Hole, MA

    508-548-8700 x2251 (voice)
    508-457-2310 (FAX)
    vatnipp@usgs.gov
    Date: 20-Jul-2018 (process 13 of 15)
    USGS Thesaurus keywords added to the keyword section. Person who carried out this activity:
    U.S. Geological Survey
    Attn: VeeAnn A. Cross
    Marine Geologist
    384 Woods Hole Road
    Woods Hole, MA

    508-548-8700 x2251 (voice)
    508-457-2310 (FAX)
    vatnipp@usgs.gov
    Date: 18-Nov-2019 (process 14 of 15)
    Crossref DOI link was added as the first link in the metadata. Person who carried out this activity:
    U.S. Geological Survey
    Attn: VeeAnn A. Cross
    Marine Geologist
    384 Woods Hole Road
    Woods Hole, MA

    508-548-8700 x2251 (voice)
    508-457-2310 (FAX)
    vatnipp@usgs.gov
    Date: 08-Sep-2020 (process 15 of 15)
    Added keywords section with USGS persistent identifier as theme keyword. Person who carried out this activity:
    U.S. Geological Survey
    Attn: VeeAnn A. Cross
    Marine Geologist
    384 Woods Hole Road
    Woods Hole, MA

    508-548-8700 x2251 (voice)
    508-457-2310 (FAX)
    vatnipp@usgs.gov
  3. What similar or related data should the user be aware of?
    Oldale, Robert N., and Barlow, Roger A., 1986, Geologic Map of Cape Cod and the Islands, Massachusetts: Miscellaneous Investigations Series Map I-1763, U.S. Geological Survey, Reston, VA.

How reliable are the data; what problems remain in the data set?

  1. How well have the observations been checked?
  2. How accurate are the geographic locations?
  3. How accurate are the heights or depths?
  4. Where are the gaps in the data? What is missing?
    Information unavailable from original metadata. Assumed that all the polygons available from the original paper map were digitized and included in this digital version.
  5. How consistent are the relationships among the observations, including topology?
    No additional checks for topological consistency were performed on the data.

How can someone get a copy of the data set?

Are there legal restrictions on access or use of the data?
Access_Constraints None.
Use_Constraints Public domain data from the U.S. Government are freely redistributable with proper metadata and source attribution. Please recognize the U.S. Geological Survey (USGS) as the source of this information. Please cite the source map as: Geologic Map of Cape Cod and the Islands, Massachusetts, 1986, Robert N. Oldale, Roger A. Barlow: Miscellaneous Investigations Series, Map I-1763.
  1. Who distributes the data set? (Distributor 1 of 1)
    VeeAnn A. Cross
    U.S. Geological Survey
    Marine Geologist
    384 Woods Hole Rd.
    Woods Hole, MA
    USA

    (508) 548-8700 x2251 (voice)
    (508) 457-2310 (FAX)
    vatnipp@usgs.gov
  2. What's the catalog number I need to order this data set? Downloadable Data
  3. What legal disclaimers am I supposed to read?
    Although this data set has been used by the U.S. Geological Survey (USGS), no warranty, expressed or implied, is made by the USGS as to the accuracy of the data and/or related materials. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the USGS in the use of these data or related materials.
  4. How can I download or order the data?
  5. What hardware or software do I need in order to use the data set?
    The data are available in Environmental Systems Research Institute (ESRI) shapefile format. The user must have ArcGIS or ArcView 3.0 or greater software to read and process the data file. In lieu of ArcView, the user may utilize another GIS application package capable of importing data. A free viewer, ArcExplorer, is also available from the ESRI website at www.esri.com/software/arcexplorer/download4.html.

Who wrote the metadata?

Dates:
Last modified: 18-Mar-2024
Metadata author:
VeeAnn A. Cross
U.S. Geological Survey
Marine Geologist
384 Woods Hole Rd.
Woods Hole, MA
USA

(508) 548-8700 x2251 (voice)
(508) 457-2310 (FAX)
whsc_data_contact@usgs.gov
Contact_Instructions:
The metadata contact email address is a generic address in the event the person is no longer with USGS. (updated on 20240318)
Metadata standard:
FGDC Content Standards for Digital Geospatial Metadata (FGDC-STD-001-1998)
This page is <https://cmgds.marine.usgs.gov/catalog/whcmsc/open_file_report/ofr2003-221/cape_geolgeog.shp.faq.html>
Generated by mp version 2.9.51 on Mon Mar 25 16:05:20 2024